Add an endBeforeStart $derived to WhoWhenSection (lexicographic ISO compare,
no Date object) that renders an inline error on the end-date field —
border-red-400, aria-invalid, aria-describedby, and a #end-date-error <p>
inside the existing aria-live region — with a ⚠ glyph so the cue is not
colour-alone (WCAG 1.4.1). Save is not disabled; the server stays the gate.
Wire ErrorCode INVALID_DATE_RANGE through errors.ts getErrorMessage and add
the single key error_invalid_date_range to de/en/es, so the same translated
string is used inline (client) and via getErrorMessage (server fallback).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds the edit-form date-precision controls to WhoWhenSection: a labelled
precision <select> (min 48px touch target for senior authors), a conditionally
revealed end-date field (only for RANGE, announced via aria-live=polite), and
the verbatim raw cell as labelled read-only static text (not a disabled input).
Fields submit as metaDatePrecision/metaDateEnd/metaDateRaw and flow through the
existing PUT form action.
Backend: DocumentService.updateDocument now persists the three DTO fields (they
existed since #671 but were never applied), so the new controls are real, not
decorative — addresses Nora's "a client <select> constrains nothing" note for
the persistence half. Server-side enum/end>=start validation remains #671's
scope.
Refs #666
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
